Fictitious data set based on results of an experiment where subjects
were randomly divided into two groups and given a placebo or vitamin c
to take during the cold season. At the end of the cold season, the
subjects were interviewed by a physician who determined whether they
had or had not suffered a cold during the period. Skeptics interviewed
the 800 subjects to determine who knew and who did not know to which
group they had been assigned. Vitamin C has a bitter taste and those
familiar with it could recognize whether their pills contained it.
Usage
ex1916
Arguments
Format
A data frame with 4 observations on the following 4 variables.